How to use this calculator
Estimate a portfolio target from annual expenses and a withdrawal-rate assumption, then project monthly contributions under an assumed return. The balance is shown in nominal dollars and compared with an expense target that grows with inflation.
How the calculation works
Target in today’s dollars = annual expenses ÷ (withdrawal-rate assumption ÷ 100). The nominal target grows with the inflation assumption each year. The monthly balance compounds at the effective monthly return and then receives the fixed monthly contribution.
Worked example
At $40,000 of annual expenses and a 4% withdrawal-rate assumption, the starting target is $1,000,000 in today’s dollars. The selected inflation assumption raises the nominal target over time.
Assumptions and limitations
The withdrawal rate is only a scenario input, not a guarantee of portfolio longevity or a recommendation. The model assumes a smooth return and fixed nominal contributions; it excludes taxes, fees, changing spending, sequence risk, and Social Security or pension income.
Official sources and further reading
Frequently asked questions
Does this say when I can safely retire?
No. It shows when a simplified scenario reaches its selected target. Market sequence, taxes, healthcare, spending changes, and other income can change a real plan.
Why does the target rise over time?
The target is compared with future nominal balances, so the entered inflation assumption increases the future nominal expense target.
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Educational scenario only. This calculator does not provide individualized investment, tax, or legal advice. Confirm transaction records, tax treatment, and investment terms with the relevant official documents or qualified professionals.